To provide a bottom lock box that makes it easy to find that the box is fraudulently opened, by improving the structure of bottom flaps so that the trace of opening the box is clearly left.
The bottom lock box 10 is designed such that end panels 1 and 3, side plates 2 and 4 and a glue flap 5 are horizontally connected in that order, bottom lid flaps are connected to the lower edges of the end panels and side panels, flaps 11 and 12 to be stuck are defined by forming creases i and j with an inclination of 45° into the right ends of the bottom flaps, and these flaps are stuck to parts 11x and 12x of the bottom lid flaps. In such a bottom lock box 10, perforations k and l are formed in the middle of the width of the bottom lid flaps 7 and 9 so as to extend vertically by the height corresponding to half the width of each end panel. Cuts m and n are made at an angle from the lower end of the perforations towards the lower edge of each flap to be stuck. Triangular foldable flap 13 and 14 extending from the perforations are formed at the right lower ends of the left parts of the corresponding divided bottom lid flaps via creases q and r. The height of the bottom lid flaps is greater than half the width of the end panel.
Higashio Masahiro
Torii Kazuhisa
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